phsutil.java

JAVA实现的短信网关程序

package sms.PHS;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import java.io.PrintStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;

class PHSUtil
{
    private static MessageDigest digest = null;
    private static final char zeroArray[] = "0000000000000000".toCharArray();

    PHSUtil()
    {
    }
    /**
     * return byte abyte1
     * @param abyte0
     * @return
     */
    public static byte[] copyBytes(byte abyte0[])
    {
        if(abyte0 == null || abyte0.length <= 0)
            return null;
        byte abyte1[] = new byte[abyte0.length];
        for(int i = 0; i < abyte0.length; i++)
            abyte1[i] = abyte0[i];

        return abyte1;
    }
    /**
     * tranform to the hex
     * @param bytes
     * @return
     */
    public static final String encodeHex(byte bytes[])
    {
        StringBuffer buf = new StringBuffer(bytes.length * 2);
        for(int i = 0; i < bytes.length; i++)
        {
            if((bytes[i] & 0xff) < 16)
                buf.append("0");
            buf.append(Long.toString(bytes[i] & 0xff, 16));
        }

        return buf.toString();
    }

    public static byte[] getBytes(String s, int len)
    {
        if(s == null)
            return new byte[0];
        if(s.length() > len)
            len = s.length();
        byte abyte1[] = new byte[len];
        System.arraycopy(s.getBytes(), 0, abyte1, 0, s.length());
        return abyte1;
    }
    /**
     * get the TimeStamp
     * @return
     */
    public static int getTimestamp()
    {
        String sNow = getTimestampString();
        return Integer.parseInt(sNow);
    }

    public static String getTimestampString()
    {
        Date now = new Date();
        SimpleDateFormat dateformat = new SimpleDateFormat("MMddHHmmss");
        String sNow = dateformat.format(now);
        return sNow;
    }

    public static final synchronized byte[] hash(String data)
    {
      /**
         if(digest != null)
            break MISSING_BLOCK_LABEL_36;
        digest = MessageDigest.getInstance("MD5");
        break MISSING_BLOCK_LABEL_35;
        NoSuchAlgorithmException nsae;
        nsae;
        System.err.println("Failed to load the MD5 MessageDigest. We will be unable to function normally.");
        nsae.printStackTrace();
        digest.update(data.getBytes());
        return digest.digest();

       */
     // if(digest != null){
        //break MISSING_BLOCK_LABEL_36;
        try {
          digest = MessageDigest.getInstance("MD5");
          digest.update(data.getBytes()); //添加要进行计算摘要的信息

        }
        catch (NoSuchAlgorithmException nsae) {
          nsae.printStackTrace();
          System.err.println(
              "Failed to load the MD5 MessageDigest. We will be unable to function normally.");
        }
      //}
        return digest.digest();          //计算出摘要



    }

    public static String toHexStr(String str0)
    {
        byte abyte0[] = str0.getBytes();
        String s = "";
        for(int i = 0; i < abyte0.length; i++)
            s = s + toHexStr(abyte0[i]);

        return new String(s);
    }

    public static String toHexStr(byte abyte0[])
    {
        String s = "";
        for(int i = 0; i < abyte0.length; i++)
            s = s + toHexStr(abyte0[i]);

        return new String(s);
    }

    public static String toHexStr(int i)
    {
        String s = "";
        for(int j = 0; j < 8; j++)
        {
            s = s + Character.forDigit(i & 0xf, 16);
            i >>= 4;
        }

        String s1 = "";
        for(int k = 8; k > 0; k--)
            s1 = s1 + s.charAt(k - 1);

        return new String(s1);
    }

    public static String toHexStr(byte byte0)
    {
        String s = "";
        s = s + Character.forDigit(byte0 >> 4 & 0xf, 16);
        s = s + Character.forDigit(byte0 & 0xf, 16);
        return new String(s);
    }

    public static final String zeroPadString(String string, int length)
    {
        if(string == null || string.length() > length)
        {
            return string;
        } else
        {
            StringBuffer buf = new StringBuffer(length);
            buf.append(zeroArray, 0, length - string.length()).append(string);
            return buf.toString();
        }
    }



}